Add option to set or disable the Ktorfit compiler plugin #764 (#770)

docs/CHANGELOG.md

@@ -7,6 +7,19 @@ and this project orients towards [Semantic Versioning](http://semver.org/spec/v2
 Note: This project needs KSP to work and every new Ktorfit with an update of the KSP version is technically a breaking change.
 But there is no intent to bump the Ktorfit major version for every KSP update. 
 
+# Unreleased
+- Provide option to not use the compiler plugin #764
+You can now set the Kotlin version for the compiler plugin. 
+By default, it will use the Kotlin version of the project. You can set it to "-" to disable the plugin.
+
+```kotlin
+ktorfit{
+    kotlinVersion = "-"
+    // or
+    kotlinVersion = "x.x.x"
+}
+```
+
 # [2.2.0]()
 * Supported Kotlin version: 2.0.0; 2.0.10; 2.0.20, 2.1.0-Beta1; 2.0.21-RC, 2.0.21, 2.1.0-RC, 2.1.0-RC2, 2.1.0, 2.1.10
 * Supported KSP version: 1.0.27, 1.0.28, 1.0.29

ktorfit-gradle-plugin/src/main/java/de/jensklingenberg/ktorfit/gradle/KtorfitCompilerSubPlugin.kt

@@ -36,7 +36,12 @@ internal class KtorfitCompilerSubPlugin : KotlinCompilerPluginSupportPlugin {
     override fun getCompilerPluginId(): String = COMPILER_PLUGIN_ID
 
     override fun isApplicable(kotlinCompilation: KotlinCompilation<*>): Boolean {
-        return true
+        val kotlinVersion =
+            myproject.ktorfitExtension(
+                GRADLE_TASKNAME
+            ).kotlinVersion.get()
+
+        return kotlinVersion != "-"
     }
 
     @OptIn(ExperimentalKotlinGradlePluginApi::class, ExperimentalBuildToolsApi::class)

ktorfit-gradle-plugin/src/main/java/de/jensklingenberg/ktorfit/gradle/KtorfitPluginExtension.kt

@@ -3,6 +3,7 @@ package de.jensklingenberg.ktorfit.gradle
 import org.gradle.api.Project
 import org.gradle.api.model.ObjectFactory
 import org.gradle.api.provider.Property
+import org.jetbrains.kotlin.buildtools.api.ExperimentalBuildToolsApi
 import org.jetbrains.kotlin.gradle.ExperimentalKotlinGradlePluginApi
 import org.jetbrains.kotlin.gradle.dsl.kotlinExtension
 import javax.inject.Inject
@@ -32,10 +33,11 @@ open class KtorfitPluginExtension
          * Specify the Kotlin version of the compiler plugin.
          *
          * Default: your current Kotlin version
+         * Set value to "-" to disable the compiler plugin
          */
         open val kotlinVersion: Property<String> = objectFactory.property(String::class.java)
 
-        @OptIn(ExperimentalKotlinGradlePluginApi::class)
+        @OptIn(ExperimentalKotlinGradlePluginApi::class, ExperimentalBuildToolsApi::class)
         internal fun setupConvention(project: Project) {
             generateQualifiedTypeName.convention(false)
             errorCheckingMode.convention(ErrorCheckingMode.ERROR)